The M14-2-1 with 304 M14 7mm Hex nut GB6172 M14 Nuts ROHS manufactured by Tong Ming is a nut made of stainless steel 304, with an M14 size and a 7mm hexagonal shape, and it is compliant with the Restriction of Hazardous Substances (RoHS) regulatory guidelines. It is designed for use with various compatible industrial components, such as screws, bolts, and other fasteners, and is typically used in medical, automotive, and construction applications.